resolver: Isolate auth token cache per session #2669

Job	Run time
prepare	8s
binaries (darwin/amd64)	1m 3s
binaries (darwin/arm64)	1m 1s
binaries (linux/amd64)	2m 12s
binaries (linux/arm/v7)	2m 4s
binaries (linux/arm64)	2m 6s
binaries (linux/s390x)	2m 35s
binaries (linux/ppc64le)	2m 10s
binaries (linux/riscv64)	2m 10s
binaries (windows/amd64)	1m 13s
binaries (windows/arm64)	57s
test / prepare	2m 0s
test / run (containerd, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	6m 45s
test / run (containerd-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integr...	9m 4s
test / run (containerd-1.6, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	6m 43s
test / run (containerd-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./fronte...	8m 26s
test / run (oci, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 2s
test / run (oci-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 5s
test / run (oci-rootless-slirp4netns-detachnetns, ./client ./cmd/buildctl ./worker/containerd ./solver ....	5m 8s
test / run (oci-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, int...	5m 4s
test / run (./..., 1, integration gateway)	4m 32s
test / run (./client, containerd, nydus, integration)	6m 38s
test / run (./client, oci, nydus, integration)	4m 53s
test / run (./..., nydus, 1, integration)	4m 1s
image	8m 17s
image (rootless)	8m 30s
release	6s
	1h 47m 53s

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